Airtel — airtel ir 99 - amount of rs. 99/- deducted without my knowledge

Address:

Chennai, Tamil Nadu, 600100

Mobile number: [protected]
An amount of rs. 99/- deducted from my prepaid account under title ir 99 value added services on my number. I have neither requested for this service nor they sought my permission to deduct this amount.
How can a service activated without my knowledge

Kindly requesting to solve the issue asap.

You can contact me @ my alternate number: [protected]